Due to involve the combination of a variety of theoretical and experimental methods,Sound velocity measurement thus becoming an important comprehensive experiment of university physics experiment even mechanics and heat experiments.The paper rigorously derived that an acoustic pressure wave nearby nodes of acoustic displacement wave could be translated to a traveling wave,thus to measure the sound speed through comparing the phases after outputting an traveling wave sign from the standing wave field.The paper explains the long-term existence of the sound velocity measurement experiment.Finally...
